It's definitely a start, and the best place to begin is at a start, so you're on the right track. Now, judging by this model. it appears you may be slightly confused about some of the core design aspects of a west cost drive. Not a problem though - we're gonna get that cleared up and make sure you know how to design the drive train style that has become the best in the west.

I'll start with the frame. Forgo the pocketing for now and wait until you have a solid drive base to take out material. You also do not need those center 2x1 extrusions. A correctly built frame will be plenty strong without them, and that's what you're gonna be making. The plates you seem to mount your bumpers to don't look too strong. Generally I'd say using a piece of 1x1 for the mounting is one of the most simple solutions here (though it certainly is not the only one). That example is one of my earlier CAD models. I'd like to point out that the diagonals in this model that support the 1x1 the bumpers are mounted to are not necessary, and more complex than the solution needs to be. Something more like this, with the 1x1 attached to some vertical tubing off the frame rail similar to your method is probably the simplest and the easiest.

Next I wanna touch on your drive system. I'm totally digging the 8wd, however it appears that you have no transmission system to drive your wheels and your sprockets are all aligned so that only one chain can go between them. That's a big no no dude, since if the one chain breaks you lose all the other wheels (aside from the directly driven wheel, but you'd still rather have all wheel drive). Have you seen the WCP WCD bearing blocks, or the VEXPro VersaBlocks? In a WCD, the bearings for the live axle system are put in bearing blocks that can move in slots in the tube to tension the chain. I'll grab some examples of them in a bit and post them here.

I'll edit this post with updates as I think of them. Keep up the good CAD work, man. You'll be making fly drives in no time.